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Table 2 Cardiopulmonary exercise and derived variables of population A (maximal exercise)

From: New method for the mathematical derivation of the ventilatory anaerobic threshold: a retrospective study

 

Healthy subjects

Patients with CV risk factors

Cardiac subjects

Peak work rate, W

170 ± 65*

121 ± 36

71 ± 28

Ramp duration, s

550 ± 139

572 ± 132

494 ± 148

Peak Borg scale

16.7 ± 1.3*

16.8 ± 1.4

15.4 ± 1.6

Peak HR, beats/min

164 ± 23*

134 ± 27

117 ± 19

%Predicted peak HR

90 ± 9.5*

83 ± 13

77 ± 12

VO2peak, mL/min

2031 ± 728*

1581 ± 413

973 ± 323

VO2peak, mL/kg/min

32.2 ± 9.2*

22.0 ± 6.0

16.0 ± 4.0

Peak R

1.18 ± 0.09

1.15 ± 0.09

1.14 ± 0.10

vVAT, mL/min

1042 ± 310*

916 ± 237

629 ± 169

vVAT, mL/min/kg

16.7 ± 4.1*

12.6 ± 3.2

10.4 ± 1.9

expVAT (VCO2), mL/min

1085 ± 353*

874 ± 199

589 ± 168

expVAT (VCO2), mL/min/kg

17.2 ± 4.2*

12.1 ± 2.7

9.7 ± 2.0

 Exponential coefficient

1.0012 ± 0.0003*

1.0013 ± 0.0002

1.0020 ± 0.0006

expVAT (VE), mL/min

1053 ± 295*

884 ± 203

634 ± 176

expVAT (VE), mL/min/kg

16.7 ± 3.4*

12.2 ± 2.8

10.4 ± 2.3

 Exponential coefficient

1.0010 ± 0.0003*

1.0011 ± 0.0002

1.0017 ± 0.0006

OUES (VCO2), mL/min

2036 ± 599*

1725 ± 345

1197 ± 326

OUES (VE), mL/min

2386 ± 679*

1988 ± 451

1413 ± 404

  1. *p-Value was significant at least at < 0.05 by 1-way analysis of variance.
  2. HR heart rate, VO2 oxygen uptake, R respiratory exchange rate, vVAT visual ventilatory anaerobic threshold: expVAT (VCO2), exponential VAT based on VO2 vs. VCO2; expVAT (VE), exponential VAT based on VO2 vs. VE; OUES (VCO2), oxygen uptake efficiency slope based on logVCO2 vs. VO2; OUES (VE), oxygen uptake efficiency slope based on logVE vs. VO2